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+%YAML 1.2
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+---
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+#
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+# G-Code (RepRap, not ISO-6983)
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+#
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+# RapRap G-Code is very simple.
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+#
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+# TODO: Lines that start with N get a different context, accepting a checksum.
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+#
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+name: G-Code (RepRap)
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+file_extensions:
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+ - [ gco, gcode ]
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+scope: source.gcode
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+variables:
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+ decimal: '[+-]?\d+(\.(\d+)?)?'
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+
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+contexts:
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+ prototype:
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+ - match: \s+
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+
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+ - include: mixin_comment
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+
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+ - match: $
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+ pop: true
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+
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+ main:
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+ - meta_content_scope: ctx.line.gcode
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+
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+ - match: '([Nn]\s*(\d+))'
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+ captures:
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+ 1: ctx.gcode_line_num
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+ 2: constant.numeric.line-number.gcode
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+
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+ - match: ()
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+ set: gcode_command
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+
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+ # G, M, or T command
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+ gcode_command:
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+ - meta_content_scope: ctx.command.gcode
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+
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+ # M20 S2 P/path/to/file/name.gco
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+ - match: ([Mm](20))(\s*(S)(2)\s*(P))
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+ captures:
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+ 1: entity.command.gcode markup.bold.gcode
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+ 2: constant.numeric.command.gcode
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+ 3: ctx.params.gcode
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+ 4: keyword.param.gcode
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+ 5: constant.numeric.param.gcode
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+ 6: keyword.param.gcode
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+ set: gcode_string_arg
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+
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+ # command followed by data
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+ - match: ([Mm]\s*(11[78]))\b
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+ captures:
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+ 1: entity.command.gcode markup.bold.gcode
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+ 2: constant.numeric.command.gcode
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+ set: gcode_string_arg
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+
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+ # command followed by data
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+ - match: '([GMTgmt]\s*(\d+)((\.)(\d+))?)'
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+ captures:
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+ 1: entity.command.gcode markup.bold.gcode
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+ 2: constant.numeric.command.gcode
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+ 4: entity.separator.subcode
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+ 5: constant.numeric.subcode
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+ set: gcode_params
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+
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+ - match: ()
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+ set: syntax_error
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+
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+ # Parameters of a command
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+ gcode_params:
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+ - meta_content_scope: ctx.params.gcode
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+
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+ # M32 [S<pos>] [P<bool>] !/path/file.gco#
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+ - match: '!'
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+ scope: entity.string.filename.open
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+ push: gcode_path_arg
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+
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+ # asterisk starts a checksum
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+ - match: \*
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+ scope: entity.checksum.gcode
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+ set: gcode_checksum
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+
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+ # parameter and value
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+ - match: ([A-Za-z])\s*({{decimal}})
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+ captures:
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+ 1: keyword.param.gcode
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+ 2: constant.numeric.param.gcode
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+
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+ # parameter with no value
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+ - match: '[A-Za-z]'
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+ scope: keyword.param.gcode
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+ set: gcode_params
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+
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+ - match: ()
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+ set: syntax_error
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+
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+ gcode_string_arg:
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+ - meta_content_scope: ctx.string.gcode
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+
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+ - match: ([^;]+)
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+ scope: string.unquoted.gcode
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+
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+ gcode_path_arg:
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+ - meta_content_scope: ctx.path.gcode
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+
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+ - match: ([^#]+)
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+ scope: string.unquoted.path.gcode
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+
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+ - match: (#)
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+ scope: entity.string.path.close.gcode
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+ pop: true
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+
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+ gcode_checksum:
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+ - meta_content_scope: ctx.checksum.gcode
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+
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+ - match: \d+
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+ scope: constant.numeric.checksum.gcode
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+
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+ - match: ()
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+ set: syntax_error
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+
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+ # Done interpreting to the end of the line
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+ gcode_line_done:
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+ - match: \s*$
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+ pop: true
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+
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+ # Comments begin with a ';' and finish at the end of the line.
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+ mixin_comment:
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+ - match: ^\s*;
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+ scope: punctuation.definition.comment.line.start
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+ set: gcode_comment
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+ - match: \s*;
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+ scope: punctuation.definition.comment.eol.start
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+ set: gcode_comment
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+
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+ # Comment to end of line.
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+ gcode_comment:
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+ - meta_scope: comment.gcode
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+ - match: \s*$
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+ pop: true
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+
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+ # Everything after this point is broken by a syntax error
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+ syntax_error:
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+ - meta_scope: invalid.error.syntax.gcode
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+
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+ - match: .*$
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+ pop: true
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